<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000356173
<NAME> Colchester Street Trust
<SERIES>
<NUMBER> 12
<NAME> Money Market Portfolio Class II
<MULTIPLIER> 1,000
<S>
<C>
<PERIOD-TYPE>
6-mos
<FISCAL-YEAR-END>
mar-30-2001
<PERIOD-END>
sep-30-2000
<INVESTMENTS-AT-COST>
15,982,938
<INVESTMENTS-AT-VALUE>
15,982,938
<RECEIVABLES>
86,222
<ASSETS-OTHER>
0
<OTHER-ITEMS-ASSETS>
0
<TOTAL-ASSETS>
16,069,160
<PAYABLE-FOR-SECURITIES>
0
<SENIOR-LONG-TERM-DEBT>
0
<OTHER-ITEMS-LIABILITIES>
31,409
<TOTAL-LIABILITIES>
31,409
<SENIOR-EQUITY>
0
<PAID-IN-CAPITAL-COMMON>
16,040,022
<SHARES-COMMON-STOCK>
164,298
<SHARES-COMMON-PRIOR>
199,580
<ACCUMULATED-NII-CURRENT>
0
<OVERDISTRIBUTION-NII>
0
<ACCUMULATED-NET-GAINS>
(2,271)
<OVERDISTRIBUTION-GAINS>
0
<ACCUM-APPREC-OR-DEPREC>
0
<NET-ASSETS>
16,037,751
<DIVIDEND-INCOME>
0
<INTEREST-INCOME>
549,680
<OTHER-INCOME>
0
<EXPENSES-NET>
16,070
<NET-INVESTMENT-INCOME>
533,610
<REALIZED-GAINS-CURRENT>
49
<APPREC-INCREASE-CURRENT>
0
<NET-CHANGE-FROM-OPS>
533,659
<EQUALIZATION>
0
<DISTRIBUTIONS-OF-INCOME>
5,232
<DISTRIBUTIONS-OF-GAINS>
0
<DISTRIBUTIONS-OTHER>
0
<NUMBER-OF-SHARES-SOLD>
1,439,990
<NUMBER-OF-SHARES-REDEEMED>
1,479,865
<SHARES-REINVESTED>
4,593
<NET-CHANGE-IN-ASSETS>
171,678
<ACCUMULATED-NII-PRIOR>
0
<ACCUMULATED-GAINS-PRIOR>
(2,321)
<OVERDISTRIB-NII-PRIOR>
0
<OVERDIST-NET-GAINS-PRIOR>
0
<GROSS-ADVISORY-FEES>
16,757
<INTEREST-EXPENSE>
0
<GROSS-EXPENSE>
20,181
<AVERAGE-NET-ASSETS>
170,253
<PER-SHARE-NAV-BEGIN>
1.000
<PER-SHARE-NII>
.031
<PER-SHARE-GAIN-APPREC>
0
<PER-SHARE-DIVIDEND>
.031
<PER-SHARE-DISTRIBUTIONS>
0
<RETURNS-OF-CAPITAL>
0
<PER-SHARE-NAV-END>
1.000
<EXPENSE-RATIO>
33
</TABLE>
